Window-sash catch.



1.B.|V1ENZ|ES.

WINDOW SASH CATCH.

APPLICATION FILED AUG.5, I9I6.

Patented Dec. 12, 1916.

16)/ wwwIW WINDOW-SASH CATCH.

Specification of Letters Patent.

Patentedlec. 12, 1916.

Application filed August 5, 1916. Serial No. 113,359.

To all Lo/wm if may concern:

Be it known that I, Jol-1N B. MENZIES, a citizen of the United States, residing at Sangue, in the county of Los Angeles and State of California, have invented new and useful improvements in Window-Sash Catches7 of which the following is a speci- .(ication.

This invention relates to locks and particularly pertains to a lock adapted to be used in combination with a window sash.

lt is an object of this invention to provide a sash lock which may be readily operated to lock a window sash against movement at any point along its path of vertical travel.

Another object is to provide a sash lock which will positively lock a sash against movement in relation to its casing without marring the finished surface of the casing and yet holding the sash in such a manner that it cannot be` moved in either an upward or downward direction.

Another object is to provide simple means for holding the locking members out of engagementwith the window casing when the window is being moved and which may be operated instantly to release the members and cause them to positively engage and lock the sash.

Another object is to provide a sash lock which is compact in its construction and design and which may be readily concealed within the stile of the sash in a sightly and workmanlike manner.

It is a further object to provide a sash lock which is simple in construction and which after being mounted in its operative position is not liable to require attention or repair.

@ther objects will appear hereinafter.

The invention is illustrated in the accompanying drawings in which:

Figure 1 is a fragmentary view in side elevation of a corner of a window sash showing it mounted within the window frame and as locked by the locking device. Fig. 2 is a view of a portion of the sash stile as seen on the line 2 2 of Fig. 1 and as fitted with the sash lock which is here shown in end elevation. Fig. 3 is a view in vertical section as seen on the line 3-3 of Fig. 2 and illustrates in detail the operating mechanism of the lock and further shows in dotted lines the locking position thereof. Fig. 4 is a view in horizontal section as seen on the line 1 4 of Fig. 3 and illustrates the lock control mechanism showing it in an immovable position in full lines and as movable in dotted lines.

Referring to the drawings more particularly, 10 indicates a window sash formed with the customary rails 11 and stiles 12. The stiles are adapted to fit between the side frame members 13 of the window frame which allow the sash vertical movement therebetween. It is immaterial what construction is embodied in the sash and frame as the present invention is adapted to be used with all slidable sash. The sash is provided with a lock 14: which is composed of a metallic frame or casing 15 formed either of sheet metal or as a metal casting. The casing is rectangular in shape and is of a narrow width which permits it to be counter-sunk within the edge of the sash stile, as particularly shown in Fig. 3 of the drawings.` rlhe casing member is held in its counter-sunk position by wood screws 16 and 17 which engage casing ears 18 and 19 eX- tending parallel to the edge of the stile and adapted to lie flush thereagainst. The casing is fitted with a face-plate 2O through which a longitudinally extending slot 21 is formed. The slot 21 formed through the casing is provided to allow vertical radial movement of a pair of swinging arms 22 and The arms are pivoted within the casing at points adjacent the rear wall thereof and upon pivot pins 2-1 and 25. The outer ends of the arms 22 and 23 are adapted to pivotally support locking jaws 26 and 27 by which the sash is locked against movement. The swinging arms are controlled by a disk 28 which is pivotallyl and slidably mounted upon a disk pin 29 secured to one wall of the casing and adapted to extend through an enlarged bore in the opposite wall. rlhe disk controls the swinging arms by means of connecting links 30 and 31 which are connected by suitable pins 32 and 88 to the arms and are pivotally secured at their opposite ends to diametrically opposite sides of the disk. Tension springs 34 and 35 connect the swinging arms to the opposite ends of the casing and provide sufficient tension to normally force the locking jaws 26 and 27 against the window frame.

In orderl to oppose the action of the springs 34 and 35 and to hold the jaws against engagement with the window cas ing, the disk 28 is adapted to be rotated and locked by means of a thumb-nut 36 which Vis formed with a tubular sleeve 37 adapted .Y adapted to Vbe reciprocally moved thereupon V-39 in the disk.

against the Vtension of a disk spring 38. The disk 28 is formed with a peripheral notch 39 which engages an inwardly extending lug 40 and which is so positioned as to lock the jaws 26 and 27 in the position shown in full lines'in Fig. 3 of the drawings. Pressure upon the thumb-nut 3G will cause the disk vto move out of contact with the lug et() and allow the rotation thereof to be effected by the action of the springs 34E and The operation of the device is decidedly simple, as the locking jaws will normally be held vout of Vengagementl with the window frame by the lug 40 which engages the slot When the window sash is to be locked, the thumb-nut 36 is depressed and 'thereby allows the disk to rotate to per- Vmit the locking jaws to engage the face of the window'frame. The springs 34 and 35 will hold the jaws in positionl andV their filelike facesv will act to wedge the sash against movement in case Veffort is made to move it either in an upward or downward direction.

lt will'thus be seen that the lock here disclosed is simple in its operation and will lock sash positively against vertical movement as well as to allow it to be instantly unlocked and permit Vthe free movement of the'sash. Y

I claim:

l. A sash lock, comprising a lock casing, a pair `of swinging arms pivoted therein and extending therefrom, locking jaws pivoted upon said swinging arms .and adapted to be moved4 outwardlyfrom said casing by said arms, i'le faces upon said locking jaws wherebyfrictional engagement may be had, a rotatable locking disk mounted within said easing, means whereby the swinging arms will act inV opposition to each other and to move thelocking jaws outwardly from the casing, means whereby rotation of the disk will retract said locking jaws, and means for locking said jaws in their retracted position.

2. A sashv lock comprising a lockcasing,

Copies of this patent may be obtained for a pair of swinging arms pivoted therein, lock jaws pivoted upon said swinging arms and adapted to be moved outwardly from said casing by said arms into operative position in engagement with the window casing, a rotatable locking disk mounted within said casing, links pivotally connecting said arms to said disk whereby said swinging arms will act in unison on the rotation of said disk, either to move said jaws into operative or inoperative position, a pivot pin on which said disk is slidably and rotatably mounted, resilient means operatively connected to said swinging arms, and tending to move them into operative position, a stationary locking lug adapted to engage a slot on said disk to hold said disk and said arms` in inoperative position, a spring engaging said disk and holding the same in engagement with said locking lug, and means mounted on' said disk whereby the latter may be moved in opposition to said spring to allow said lug to be disengaged and said resilient means to move said jaws into operative position.

3. A sash lock comprising a lock casing,

Va pair of swinging arms pivoted therein,

lock jaws pivoted upon said swinging arms and adapted to be moved into operative position into engagement with the window casing, a rotatable locking disk mounted within said casing, links pivotally connecting said arms to said disk, whereby said swinging arms will act in unison on the rotation of said disk, either to move said jaws into operative or inoperative position, a pivot pin on which said disk is slidably androtatably mounted, a stationary locking lug adapted to engage a slot on said disk to hold said disk and said arms in inoperative position, resilient means holding said disk in engagement with said locking lug, and means mounted on said disk whereby the latter may be moved in opposition to said resilient means to allow said lug to be disengaged and said arms to be moved into operative position.

In testimony whereof I have signed my name to this specification.

JOHN B. MENZIES.

i'ive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

